package com.myeclipse.gen;
import java.io.*;
import java.text.*;
import java.util.Calendar;

public class MyEclipseGen
{

    private static final String LL = "Decompiling this copyrighted software is a violation of both your license agreement and the Digital Millenium Copyright Act of 1998 (http://www.loc.gov/copyright/legislation/dmca.pdf). Under section 1204 of the DMCA, penalties range up to a $500,000 fine or up to five years imprisonment for a first offense. Think about it; pay for a license, avoid prosecution, and feel better about yourself.";

    public String getSerial(String userId, String licenseNum)
    {
        Calendar cal = Calendar.getInstance();
        cal.add(1, 3);
        cal.add(6, -1);
        NumberFormat nf = new DecimalFormat("000");
        licenseNum = nf.format(Integer.valueOf(licenseNum));
        String verTime = (new StringBuilder("-")).append((new SimpleDateFormat("yyMMdd")).format(cal.getTime())).append("0").toString();
        String type = "YE3MP-";
        String need = (new StringBuilder(userId.substring(0, 1))).append(type).append("300").append(licenseNum).append(verTime).toString();
        String dx = (new StringBuilder(need)).append("Decompiling this copyrighted software is a violation of both your license agreement and the Digital Millenium Copyright Act of 1998 (http://www.loc.gov/copyright/legislation/dmca.pdf). Under section 1204 of the DMCA, penalties range up to a $500,000 fine or up to five years imprisonment for a first offense. Think about it; pay for a license, avoid prosecution, and feel better about yourself.").append(userId).toString();
        int suf = decode(dx);
        String code = (new StringBuilder(need)).append(String.valueOf(suf)).toString();
        return change(code);
    }

    private int decode(String s)
    {
        int i = 0;
        char ac[] = s.toCharArray();
        int j = 0;
        for(int k = ac.length; j < k; j++)
            i = 31 * i + ac[j];

        return Math.abs(i);
    }

    private String change(String s)
    {
        byte abyte0[] = s.getBytes();
        char ac[] = new char[s.length()];
        int i = 0;
        for(int k = abyte0.length; i < k; i++)
        {
            int j = abyte0[i];
            if(j >= 48 && j <= 57)
                j = ((j - 48) + 5) % 10 + 48;
            else
            if(j >= 65 && j <= 90)
                j = ((j - 65) + 13) % 26 + 65;
            else
            if(j >= 97 && j <= 122)
                j = ((j - 97) + 13) % 26 + 97;
            ac[i] = (char)j;
        }

        return String.valueOf(ac);
    }

    public MyEclipseGen()
    {
    }

    public String getGenInfo(String userId)
    {
        return getSerial(userId, "5");
    }

    public static void main(String args[])
    {
        try
        {
            System.out.println("please input register name:");
            BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
            String userId = null;
            userId = reader.readLine();
            MyEclipseGen myeclipsegen = new MyEclipseGen();
            String res = myeclipsegen.getSerial(userId, "5");
            System.out.println("Serial:" + res);
            reader.readLine();
        }
        catch(IOException ioexception) { }
    }
}